Mathematics · Trigonometry

If cos 9α = sin α and 9α < 90°, then what is the value of tan 5α?

Verified Solution4 OptionsUpdated: October 2026👁️1 View

11✓
20
31 / √3
4√3

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If cos 9α = sin α and 9α < 90°, then what is the value of tan 5α?

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If cos 9α = sin α and 9α < 90°, then what is the value of tan 5α?